openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

media: cx23885: add more quirks for reset DMA on some AMD IOMMU 

On AMD Family 15h (Models 30h-3fh), I/O Memory Management Unit
RiSC engine sometimes stalls, requiring a reset.

As result, MythTV and w-scan won't scan channels on the AMD Kaveri
APU with the Hauppauge QuadHD TV tuner card.

For the solution I added the Input/Output Memory Management Unit's PCI
Identity of 0x1423 to the broken_dev_id[] array, which is used by
a quirks logic meant to fix similar problems with other AMD
chipsets.

Signed-off-by: Daniel Lee Kruse <daniel.lee.kruse@protonmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
This commit is contained in:
Daniel Lee Kruse 2020-09-30 05:36:35 +02:00 committed by Mauro Carvalho Chehab
parent a109073bb9
commit dbf0b3a7b7
1 changed files with 4 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/media/pci/cx23885/cx23885-core.c
View File

@ -2073,6 +2073,10 @@ static struct {
* 0x1451 is PCI ID for the IOMMU found on Ryzen * 0x1451 is PCI ID for the IOMMU found on Ryzen
*/ */
{ PCI_VENDOR_ID_AMD, 0x1451 }, { PCI_VENDOR_ID_AMD, 0x1451 },
/* According to sudo lspci -nn,
* 0x1423 is the PCI ID for the IOMMU found on Kaveri
*/
{ PCI_VENDOR_ID_AMD, 0x1423 },
}; };
static bool cx23885_does_need_dma_reset(void) static bool cx23885_does_need_dma_reset(void)